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How to verify if an OLE control is installed...
Message
From
08/08/2003 07:35:01
Cetin Basoz
Engineerica Inc.
Izmir, Turkey
 
General information
Forum:
Visual FoxPro
Category:
Coding, syntax & commands
Miscellaneous
Thread ID:
00817873
Message ID:
00818124
Views:
44
This message has been marked as the solution to the initial question of the thread.
>I need the know if the Microsoft Animation Control is install.
>My VFP 6.0 is use a .AVI and I need that control to display my form.
>
>Any one have that code to verify if the ActiveX is install?

Check registry for Activex's OleClass property. ie: For treeview control :
? _IsClassRegistered(''MsComCtLib.TreeCtrl')

function _IsClassRegistered
lparameters tcClass
#DEFINE HKEY_CLASSES_ROOT    -2147483648
#DEFINE ERROR_SUCCESS		0	&& OK

DECLARE Integer RegOpenKey IN Win32API ;
	Integer nHKey, String @cSubKey, Integer @nResult

DECLARE Integer RegCloseKey IN Win32API ;
	Integer nHKey

local lnKey
lnKey = 0
llRetVal = ( RegOpenKey(HKEY_CLASSES_ROOT, tcClass, @lnKey) = ERROR_SUCCESS )
if llRetVal
  RegCloseKey(lnKey)
endif
*vfp7
*CLEAR DLLS 'RegOpenKey', 'RegCloseKey'
return llRetVal
Cetin
Çetin Basöz

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